Replacement of the HVAC blower motor control module (power module) on a 2024 Model Y Performance. The module is accessed from the front passenger footwell and regulates blower speed via PWM signal from the HVAC controller.

Warnings

Tools required

Parts

• Blower motor control module (HVAC power module) × 1 — Tesla Model 3/Y HVAC blower control module — match by VIN at parts counter

Preparation

1. Park on level ground, place in P, and engage the parking brake.
2. Exit ALL doors with the key fob away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the 12V low-voltage battery. On 2024 Model Y the 12V (Li-ion) battery is accessed under the front trunk (frunk) trim — remove the frunk liner and disconnect the negative terminal first.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
5. If at any point you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
6. Move the front passenger seat fully rearward and to its highest position to gain footwell access.
7. Place a clean fender cover or shop towel over the door sill to protect trim.
8. Confirm the replacement blower control module matches the part on the vehicle — there have been running production changes on Model 3/Y HVAC modules.

Procedure

1. 1

   Verify 12V is disconnected and HVAC is off
   Confirm the 12V negative terminal is disconnected and isolated. Verify the HVAC fan is not running by attempting to wake the vehicle briefly with the door — it should remain dark. Re-isolate the 12V terminal before proceeding.
2. 2

   Remove the passenger footwell lower trim/kick panel
   Using a plastic trim tool, release the lower dash closeout panel above the passenger footwell. On Model Y this panel is held by push-pin clips and may have one or two fasteners. Set hardware aside in a labeled cup.
3. 3

   Reposition the footwell carpet/insulation
   Fold the passenger footwell carpet rearward to expose the underside of the HVAC case. Take care not to crease the foam backing. Tuck it under the seat to keep it out of the work area.
4. 4

   Locate the blower motor control module
   The blower motor control module mounts to the underside of the HVAC blower housing on the passenger side, with a finned heatsink protruding into the blower's airflow path. Identify the module body and its single electrical connector before disturbing any wiring.
5. 5

   Disconnect the module's electrical connector
   Release the connector lock tab (lift, then squeeze depending on connector style) and pull the connector straight off. Inspect the connector pins for heat discoloration, melted plastic, or corrosion — heat damage here indicates the blower motor itself may also be failing and should be load-tested before reassembly.
6. 6

   Remove the module mounting fasteners
   Remove the screws/bolts retaining the control module to the blower housing. Support the module as you remove the last fastener so it doesn't fall. Note fastener length/location — they are not always identical.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
7. 7

   Remove the failed module
   Withdraw the module straight down out of the blower housing. The heatsink fins must clear the housing opening — do not pry sideways or you may damage the housing seal. Inspect the opening for debris (leaves, hair) and vacuum out as needed.
8. 8

   Compare old and new modules
   Lay the old and new modules side by side. Confirm connector keying, heatsink size, mounting hole pattern, and any gasket/foam seal are identical. If a foam seal is provided loose, install it on the new module per its packaging.
9. 9

   Install the new blower motor control module
   Insert the new module into the housing opening with the heatsink oriented into the airflow path. Start all mounting fasteners by hand to avoid cross-threading the plastic housing bosses. Tighten in a cross pattern to the verified module mounting torque. Do not overtighten — these thread into plastic.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
10. 10

    Reconnect the electrical connector
    Seat the connector fully until the lock tab clicks. Give the harness a gentle tug to confirm engagement. Route the harness back into its original retainers — do not let it rest against the heatsink.

Reassembly

1. Unfold and reseat the passenger footwell carpet/insulation in its original position.
2. Reinstall the lower dash closeout/kick panel, ensuring all push-pin clips fully seat.
3. Return the passenger seat to its previous position.
4. Reconnect the 12V battery negative terminal and torque to the verified Battery Terminal Bolts spec. Reinstall the frunk liner.
5. Allow the vehicle to wake and complete its normal LV power-up sequence (approximately 30-60 seconds) before testing.
6. Torque to OEM specification — refer to Tesla Service Manual for any fasteners not covered by the verified torque list.

Verification

• From the touchscreen, turn the climate system on and cycle blower speed from lowest to highest. Fan speed should ramp smoothly through all settings with no surging, cutting out, or buzzing.
• Verify Auto mode works — the system commands variable blower speeds via the new control module.
• Check for HVAC-related alerts on the touchscreen (Service tab). Clear any prior fan/blower-related fault if present and re-test.
• Listen at the passenger footwell for any rattling — a loose module heatsink will resonate at mid-fan speeds.
• After 5-10 minutes of operation, verify there is no burning smell from the footwell vents (indicates undersized connector contact or wrong module).
• While the HVAC system is open, confirm the cabin air filter service interval — Tesla recommends cabin filter replacement every 2 years on Model Y. Note the date in the owner's records.

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